Although cats are adaptable and friendly creatures they do not make good pets for certain types of people or for people with certain health problems.

 For instance, don't get a cat or kitten if you are pregnant. The cat's exposed feces can cause a potentially fatal blood disease called toxemia.  

Another related health problem that cats can cause for both pregnant and ailing individuals (people with diseases and compromised immune systems) is caused by cat hair and dander. Kittens are not suitable companions for pregnant women, as being exposed their feces can cause a potentially fatally blood disease called toxemia in both mother and child.Cat hair and cat dander (skin flakes) in the air overstimulate the immune system and create respiratory problems not only for a mother and child but also for elderly individuals and those with diseases that cause the immune system to be overly stimulated such as AIDS. 

Cats are also not recommended as pets for people who suffer from respiratory problems such as bronchitis, asthma or emphysema.  Cat dander and cat hair is inhaled, irritating the human’s airways even further. People who have allergies to cats should also avoid owning a cat. If you are not sure if you have an allergy to cat hair, do both the cat and yourself a favor and get yourself tested before you got to the shelter or a pet store. Too many animals end up in shelters or humane societies simply because an inconsiderate potential pet owner did not take the time and expense to find out if they were allergic to the animal before taking it home. 

Kittens are not recommended as pets in households with infants or toddlers.  The old wives' tale where a cat will kill a baby by 'stealing its breath' has its roots in some truth. A cat will seek out a place of warmth and infants make good space heaters. It is quite easy for a large cat with even the snuggliest of intentions to accidentally smother a small infant.  

Don't own a cat if you can’t afford it. Many selfish people think that nature takes its course or that a cat can just eat scraps from your plate. This is not true. A kitten is certainly less expensive to take care of than a puppy, but within the first year you can expect to spend an absolute minimum of $640 on a new cat.  This includes such expenses as a litter box, food, a collar, a carrier, toys, spaying, neutering and vaccination. If you do not have at least that amount in your bank account, then you cannot afford to own a cat. You should also not own a kitten if you or a member of your family suffers from schizophrenia, manic depression, alcoholism, and addiction. Unfortunately, one of the main traits of these diseases is irresponsibility. Like children, kittens need routine, responsible care and consistency in order to be happy and healthy. If you are a collector of fine art or rare furniture get a gold fish instead.  Kittens are naturally destructive at first and owning one will merely frustrate and anger you.